A protective device for distance measurement of large transport vehicles

Abstract

The present invention belongs to the technical field of auxiliary equipment for vehicle signal devices, and specifically relates to a protective device for distance measurement of large transport vehicles. It includes a dustproof shell, an opening and closing mirror cover mechanism and a fixed installation mechanism. The mirror cover mechanism includes a first motor, a large gear and a small gear that mesh with each other. A light-transmitting hole is opened in the middle of the large gear corresponding to the lens window hole. When the large gear rotates forward or reversely, four sliders are aligned or separated corresponding to one end of the light-transmitting hole, which can realize the opening and closing of the maximum circular area in a very small space, and the light-transmitting hole can be covered or opened. When distance measurement is not required, the light-transmitting hole can be covered, which can effectively avoid the adhesion of dust on the optical lens, reduce the interference of dust on the light path, and improve the accuracy and stability of the distance measurement device; the fixed installation mechanism can realize the clamping installation or magnetic suction installation of the protective device. When the installation is completed, the position of the L-shaped clamping plate can be adjusted to adjust the horizontal distance or vertical distance of the laser distance measurement device side when passing through obstacles.

Description

Technical Field

[0001] The invention belongs to the technical field of auxiliary equipment for vehicle signal devices, and in particular relates to a protective device for distance measurement of a large transport vehicle. Background Art

[0002] Large transport vehicles need to measure the vehicle behavior and obstacles in various obstacles such as bends, bridge tunnels, ramps, toll booths, traffic lights, power lines, communication cables, billboards, etc., and judge the vehicle's passability based on experience. Long-term measurement is likely to cause traffic congestion, and there is a great threat to the personal safety of measurement personnel. Laser ranging devices can be used for measurement to improve transportation efficiency and reduce safety hazards. Laser ranging devices are composed of a network array of ranging sensors. Optical lens contamination of ranging sensors is a common problem, which will cause the laser ranging device to fail.

[0003] However, large transport vehicles are often operated in the field, and the working environment is special and diverse. There will be dust in the environment. During the light source transmission / reception process, as long as these dust particles are scattered in the air, the optical lens will be easily contaminated. When the light is irradiated on the contaminated optical lens surface, it will affect the transmission and reflection of the optical lens. In addition, the light irradiated on the non-uniform medium will also cause scattering, which will cause the light path to deviate from the established trajectory, reduce the accuracy of laser ranging or even malfunction, which seriously limits the use environment and development prospects of laser ranging devices.

[0004] At the same time, the frame of the flatbed trailer of a large transport truck is made of high-strength alloy steel, which is difficult to process and difficult to drill holes for fastening with bolts. Using a single-sided magnetic connection will cause shear force during bumpy driving and cause sliding, resulting in serious errors in the derived distance measurement.

[0005] Therefore, there is an urgent need for a protective device for ranging of large transport vehicles, which can be easily assembled and disassembled while ensuring the accuracy and reliability of laser ranging measurement. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a protective device for ranging of large transport vehicles, which is convenient for installation and disassembly of the ranging device around the large transport vehicle, and at the same time prevents dust and stains from adhering to the laser lens for a long time, thereby minimizing optical path interference and improving the accuracy and stability of the laser ranging sensor.

[0007] The present invention is realized by the following technical scheme: a protective device for distance measurement of a large transport vehicle, comprising an upright cubic dustproof housing 1, a laser distance measuring device is installed inside the dustproof housing 1, and a circular optical lens 2 of the laser distance measuring device is correspondingly installed at the bottom of the dustproof housing 1, so that the laser emitted by the laser distance measuring device is projected through a lens window hole 11 at the bottom of the dustproof housing 1;

[0008] The bottom end of the dustproof housing 1 is provided with an openable mirror cover mechanism, which includes a first motor 31, a large gear 32 and a small gear 33 meshing with each other. The large gear 32 and the small gear 33 are horizontally arranged at the bottom end of the dustproof housing 1 through a mounting seat 35. The output shaft of the first motor 31 is coaxially connected to the small gear 33 through a keyway. A light-transmitting hole 321 is provided in the middle of the large gear 32 corresponding to the lens window hole 11. A cross-shaped groove 322 is provided on the upper end surface of the large gear 32. Four sliders 323 are matched in the cross-shaped groove 322. When the large gear 32 rotates forward or reversely, the four sliders 323 are aligned or separated corresponding to one end of the light-transmitting hole 321, so that the light-transmitting hole 321 can be covered or opened.

[0009] The dustproof housing 1 is provided with a dust removal mechanism, which includes a second motor 41, a dust removal brush 42 and a dust sensor 43, and the output shaft of the second motor 41 is coaxially connected to the optical lens 2 through a keyway, and the dust sensor 43 is installed at the bottom end of the dustproof housing 1. The rotation speed of the second electrode 41 can be controlled according to the detection result of the dust sensor 43, and then the rotation speed of the optical lens 2 relative to the dust removal brush 42 can be controlled to reasonably clean the optical lens 2;

[0010] It also includes a fixed installation mechanism, which includes a horizontally arranged base plate 51 and an L-shaped clamping plate 52 arranged above the base plate 51 through a butterfly nut, and the horizontally extended end of the L-shaped clamping plate 52 is movably connected to the side of the dustproof shell 1 through a rotating shaft 53; when installing the protective device, adjust the butterfly nut to adjust the clamping distance between the base plate 51 and the horizontal part of the L-shaped clamping plate 52, clamp the vehicle plate of the large transport vehicle, and complete the fixed installation.

[0011] Furthermore, a mounting boss 12 is provided on the dustproof housing 1 above the rotating shaft 53;

[0012] The horizontal portion of the bottom plate 51 extending out of the L-shaped clamping plate 52 at one end away from the dustproof housing 1 is the bottom plate extension end, and the upper end surface of the bottom plate extension end and the corresponding surface of the vertical portion of the L-shaped clamping plate 52 are perpendicular to each other to form a mounting surface 54;

[0013] The magnetic attraction grooves 6 with magnets are evenly arranged on the convex surface of the mounting boss 12, the mounting surface 54, the bottom plate 51 and the corresponding connecting surface of the dustproof housing 1;

[0014] When the L-shaped clamping plate 52 is arranged horizontally, the corresponding connecting surfaces of the bottom plate 51 and the dustproof housing 1 are attracted by magnets, so that the mounting surface 54 is located on one side of the dustproof housing 1;

[0015] When the horizontal portion of the L-shaped clamping plate 52 is turned upward by 90 degrees, the horizontal portion of the L-shaped clamping plate 52 and the mounting boss 12 are attached and attracted by the magnet, so that the mounting surface 54 is turned upward by 90 degrees and the mounting surface 54 is located at the upper end of the dustproof housing 1.

[0016] Furthermore, the dustproof housing 1 is provided with a top cover 13 and a bottom cover 14 at the upper and lower ends thereof, respectively, and a vertical partition 15 and a horizontal partition 16 are provided inside the dustproof housing 1;

[0017] The horizontal partition 16 is arranged at the bottom of the dustproof housing 1 to separate the bottom of the dustproof housing 1 into a lens cavity 17, and the optical lens 2 is horizontally arranged in the lens cavity;

[0018] The vertical partition 15 is arranged in the dustproof housing 1 above the lens cavity and separates the distance measuring device cavity and the driving control cavity;

[0019] The distance measuring device cavity is provided with a distance measuring device, the driving control cavity is provided with a driving device, and the lens window hole 11 penetrates the horizontal partition plate 16 and the bottom cover 14 corresponding to the distance measuring device cavity, so that the laser emitted by the distance measuring device is emitted through the optical lens 2 through the lens window hole 11;

[0020] The second motor 41 is installed in the driving control cavity, the output shaft of the second motor 41 passes through the horizontal partition 16 and is coaxially connected to the optical lens 2 through a keyway, and the dust removal brush 42 is fixedly installed in the lens cavity below the optical lens 2.

[0021] Furthermore, an LED light strip 141 is provided at the upper end of the bottom cover 14 , and a photoresistor 21 is provided above the optical lens 2 . When the LED light strip 141 is illuminated, the photoresistor 21 is used to detect the cleanliness of the optical lens 2 .

[0022] Furthermore, the mounting seat 35 is in the shape of a circular plate, and a circular hole is provided in the middle of the circular plate corresponding to the light-transmitting hole 321, and a small gear mounting hole 351 is provided on the outer circumference of the circular plate.

[0023] The circular plate is provided with four arc grooves 352, and each slider 323 is provided with an insert shaft, which is movably inserted in the corresponding arc groove 352. When the large gear 32 rotates, the insert shaft moves in the corresponding arc groove 352, and each slider 323 slides along the cross groove 322.

[0024] One end of each slider corresponding to the light-transmitting hole 321 is a 45° tip. When the 45° tips of the four sliders are aligned, the circular hole and the light-transmitting hole 321 are covered.

[0025] Beneficial effects of the present invention:

[0026] 1. The protective device of the present invention comprises a dustproof housing, the bottom end of which is provided with an opening and closing mirror cover mechanism, the mirror cover mechanism comprising a first motor, a large gear and a small gear meshing with each other, a light-transmitting hole is provided in the middle of the large gear corresponding to the lens window hole, when the large gear rotates forward or reversely, four sliders are aligned or separated corresponding to one end of the light-transmitting hole, and the opening and closing of the maximum circular area can be realized in a very small space, and the light-transmitting hole can be shielded or opened, and then the laser emitted by the laser distance measuring device passes through the light-transmitting hole or is shielded, and when the distance measurement is not required, the light-transmitting hole can be shielded, which can effectively prevent dust from adhering to the optical lens, reduce the interference of dust on the optical path, and improve the accuracy and stability of the distance measuring device;

[0027] A dust removal mechanism is provided in the dustproof housing, which includes a second motor, a dust removal brush and a dust sensor. The dust sensor can detect the dust content in the environment, control the rotation speed of the second electrode, and then control the rotation speed of the optical lens relative to the dust removal brush to reasonably clean the optical lens, which is conducive to achieving periodic dust removal without dead angles, and cleverly avoids the obstruction of the light path by the brush during traditional mirror dust removal, ensuring that the mirror light path is unobstructed and the dust removal efficiency is high.

[0028] 2. The protective device of the present invention has a fixed installation mechanism that can be installed on the vehicle plate of a large transport vehicle with a flange, and is used for the lens window hole to realize three working modes: facing upward, facing the ground, and horizontal. When the lens window hole of the protective device needs to face upward to measure the clearance height, the horizontal part of the L-shaped clamping plate is flipped upward by 90 degrees, and the installation surface is flipped upward by 90 degrees. The installation surface is located at the upper end of the dustproof shell, and the installation surface is attracted to the upper surface of the vehicle plate of the large transport vehicle and the flange end surface through magnets;

[0029] When the lens window hole of the protective device needs to face downward to measure the ground clearance, the L-shaped clamping plate is arranged horizontally, and the corresponding connecting surfaces of the bottom plate and the dustproof shell are attracted by magnets, so that the mounting surface is located on one side of the dustproof shell, and the mounting surface is attracted by magnets to the side surface and the lower surface of the vehicle plate of the large transport vehicle;

[0030] When the lens window hole of the protection device needs to be level to measure the distance between obstacles on both sides of the vehicle, when the horizontal part of the L-shaped clamping plate is turned upward by 90 degrees, the mounting surface is turned upward by 90 degrees, the mounting surface is located at the upper end of the dustproof housing, the mounting surface is attracted to the side surface and the upper surface of the vehicle plate of the large transport vehicle by magnets, and the butterfly nut is adjusted to adjust the clamping distance between the bottom plate and the horizontal part of the L-shaped clamping plate to clamp the vehicle plate flange of the large transport vehicle;

[0031] Therefore, the protection device is easy to install and disassemble on a large transport vehicle, can be adapted to installation in a variety of different working conditions, and can simultaneously realize horizontal and vertical distance measurement when passing through obstacles.

[0032] 3. The protective device of the present invention has an LED light strip on the upper end of the bottom cover, and a photoresistor is provided above the optical lens. When the LED light strip is illuminated, the photoresistor is used to detect the cleanliness of the optical lens, and provide real-time feedback on the dust removal effect of the optical lens to form a closed-loop control. When the threshold range is exceeded, an alarm is issued and a prompt is given to replace the lens to ensure that the mirror cleanliness and transmittance are within the set threshold range, thereby realizing intelligent dust removal and energy-saving control, effectively avoiding laser ranging errors and mistakes caused by dust, and improving the accuracy and stability of the ranging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is an axial view from below of the protection device of the present invention.

[0034] Figure 2 It is an axial view from above of the protection device of the present invention.

[0035] Figure 3 The figure is a schematic diagram of the structure of the dustproof housing of the protective device of the present invention.

[0036] Figure 4 for Figure 3 sectional view of .

[0037] Figure 5 The figure is a schematic diagram of the structure of the opening and closing mirror cover mechanism of the protective device of the present invention.

[0038] Figure 6 for Figure 5 Exploded view of.

[0039] Figure 7 This is a diagram of the state when the retractable mirror cover mechanism is closed.

[0040] Figure 8 for Figure 7 A partial exploded view of the .

[0041] Fig. 9 This is a diagram of the state when the retractable mirror cover mechanism is opened.

[0042] Fig.10 This is a diagram of the installation and use status of the protection device of the present invention.

[0043] Fig.11 for Fig.10 Enlarged view of point A.

[0044] Fig.12 for Fig.10 Enlarged view of point B.

[0045] Fig.13 for Fig.10 Enlarged view of point C.

[0046] Wherein: 1 dustproof shell, 11 lens window hole, 12 mounting boss, 13 top cover, 14 bottom cover, 141 LED light strip, 15 vertical partition, 16 horizontal partition, 2 optical lens, 21 photoresistor, 31 first motor, 32 large gear, 321 light transmission hole, 322 cross groove, 323 slider, 33 small gear, 35 mounting seat, 351 small gear mounting hole, 352 arc groove, 41 second motor, 42 dust removal brush, 43 dust sensor, 51 bottom plate, 52 L-shaped clamping plate, 53 rotating shaft, 54 mounting surface, 6 magnetic suction groove. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation methods described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] See Figure 1 and Figure 2 A protective device for measuring distance of a large transport vehicle comprises an upright cubic dustproof housing 1, a laser distance measuring device is installed inside the dustproof housing 1, and a circular optical lens 2 of the laser distance measuring device is correspondingly installed at the bottom of the dustproof housing 1, so that the laser emitted by the laser distance measuring device is projected through a lens window hole 11 at the bottom of the dustproof housing 1;

[0049] The bottom end of the dustproof housing 1 is provided with an opening and closing mirror cover mechanism.

[0050] See Figure 3 and 4 The dustproof housing 1 has a top cover 13 and a bottom cover 14 at the upper and lower ends thereof, and a vertical partition 15 and a horizontal partition 16 are arranged inside the dustproof housing 1;

[0051] The horizontal partition 16 is arranged at the bottom of the dustproof housing 1 to separate the bottom of the dustproof housing 1 into a lens cavity 17, and the optical lens 2 is horizontally arranged in the lens cavity;

[0052] The vertical partition 15 is arranged in the dustproof housing 1 above the lens cavity and separates the distance measuring device cavity and the driving control cavity;

[0053] The distance measuring device cavity is provided with a distance measuring device, the driving control cavity is provided with a driving device, and the lens window hole 11 penetrates the horizontal partition plate 16 and the bottom cover 14 corresponding to the distance measuring device cavity, so that the laser emitted by the distance measuring device is emitted through the optical lens 2 through the lens window hole 11;

[0054] The second motor 41 is installed in the driving control cavity, the output shaft of the second motor 41 passes through the horizontal partition 16 and is coaxially connected to the optical lens 2 through a keyway, and the dust removal brush 42 is fixedly installed in the lens cavity below the optical lens 2.

[0055] A dust removal mechanism is provided in the dustproof housing 1, and the dust removal mechanism includes a second motor 41, a dust removal brush 42 and a dust sensor 43, and the output shaft of the second motor 41 is coaxially connected to the optical lens 2 through a keyway, and the dust sensor 43 is installed at the bottom end of the dustproof housing 1. The rotation speed of the second electrode 41 can be controlled according to the detection result of the dust sensor 43, and then the rotation speed of the optical lens 2 relative to the dust removal brush 42 can be controlled to reasonably clean the optical lens 2.

[0056] See Figure 5 and Figure 6 The lens cover mechanism includes a first motor 31, a large gear 32 and a small gear 33 meshing with each other. The large gear 32 and the small gear 33 are horizontally arranged at the bottom end of the dustproof housing 1 through a mounting seat 35. The output shaft of the first motor 31 is coaxially connected to the small gear 33 through a keyway. A light-transmitting hole 321 is provided in the middle of the large gear 32 corresponding to the lens window hole 11. A cross-shaped groove 322 is provided on the upper end surface of the large gear 32. Four sliders 323 are arranged in the cross-shaped groove 322, which can realize the opening and closing of the maximum circular area in a very small space.

[0057] The mounting seat 35 is in the shape of a circular plate, and a circular hole is opened in the middle of the circular plate corresponding to the light-transmitting hole 321, and a small gear mounting hole 351 is provided on the outer circumference of the circular plate.

[0058] The circular plate is provided with four arc grooves 352, and each slider 323 is provided with an insert shaft, which is movably inserted in the corresponding arc groove 352. When the large gear 32 rotates, the insert shaft moves in the corresponding arc groove 352, and each slider 323 slides along the cross groove 322.

[0059] One end of each slider corresponding to the light-transmitting hole 321 is a 45° tip. When the 45° tips of the four sliders are aligned, the circular hole and the light-transmitting hole 321 are covered.

[0060] An LED light strip 141 is disposed at the upper end of the bottom cover 14 , and a photoresistor 21 is disposed above the optical lens 2 . When the LED light strip 141 is illuminated, the photoresistor 21 is used to detect the cleanliness of the optical lens 2 .

[0061] See Figure 7 , Figure 8 and Fig. 9When the large gear 32 rotates forward or reversely, the four sliders 323 are aligned or separated corresponding to one end of the light-transmitting hole 321, so that the light-transmitting hole 321 can be covered or opened; and then the laser emitted by the laser ranging device passes through the light-transmitting hole or is covered. When the distance measurement is not needed, the light-transmitting hole 321 is covered, which can effectively prevent dust from adhering to the optical lens 2, reduce the interference of dust on the light path, and improve the accuracy and stability of the ranging device.

[0062] It also includes a fixed installation mechanism, which includes a horizontally arranged base plate 51 and an L-shaped clamping plate 52 arranged above the base plate 51 through a butterfly nut, and the horizontally extended end of the L-shaped clamping plate 52 is movably connected to the side of the dustproof shell 1 through a rotating shaft 53; when installing the protective device, adjust the butterfly nut to adjust the clamping distance between the base plate 51 and the horizontal part of the L-shaped clamping plate 52, clamp the vehicle plate of the large transport vehicle, and complete the fixed installation.

[0063] A mounting boss 12 is provided on the dustproof housing 1 above the rotating shaft 53;

[0064] The horizontal portion of the bottom plate 51 extending out of the L-shaped clamping plate 52 at one end away from the dustproof housing 1 is the bottom plate extension end, and the upper end surface of the bottom plate extension end and the corresponding surface of the vertical portion of the L-shaped clamping plate 52 are perpendicular to each other to form a mounting surface 54;

[0065] The magnetic attraction grooves 6 with magnets are evenly arranged on the convex surface of the mounting boss 12, the mounting surface 54, the bottom plate 51 and the corresponding connecting surface of the dustproof housing 1;

[0066] When the L-shaped clamping plate 52 is arranged horizontally, the corresponding connecting surfaces of the bottom plate 51 and the dustproof housing 1 are attracted by magnets, so that the mounting surface 54 is located on one side of the dustproof housing 1;

[0067] When the horizontal portion of the L-shaped clamping plate 52 is turned upward by 90 degrees, the horizontal portion of the L-shaped clamping plate 52 and the mounting boss 12 are attached and attracted by the magnet, so that the mounting surface 54 is turned upward by 90 degrees and the mounting surface 54 is located at the upper end of the dustproof housing 1.

[0068] See Fig.10 The fixed installation mechanism can realize the installation of the protective device on the vehicle plate of a large transport vehicle with a flange, and is used for the lens window hole 11 to realize three working modes: upward, ground-facing and horizontal.

[0069] When the lens window hole 11 of the protection device needs to face upward to measure the clearance height, the horizontal part of the L-shaped clamping plate 52 is turned upward by 90 degrees, and the mounting surface is turned upward by 90 degrees. The mounting surface is located at the upper end of the dustproof shell, and the mounting surface is attracted to the upper surface and flange end surface of the vehicle plate of the large transport vehicle through magnets. Fig.11 .

[0070] When the lens window hole 11 of the protective device needs to face downward to measure the ground clearance, the L-shaped clamping plate 52 is arranged horizontally, and the corresponding connecting surfaces of the bottom plate 51 and the dustproof housing 1 are attracted by magnets, so that the mounting surface is located on one side of the dustproof housing 1, and the mounting surface is attracted by magnets to the side surface and the lower surface of the vehicle plate of the large transport vehicle. Fig.12 .

[0071] When the lens window hole 11 of the protection device needs to be level to measure the distance between obstacles on both sides of the vehicle, when the horizontal part of the L-shaped clamping plate 52 is turned upward by 90 degrees, the mounting surface is turned upward by 90 degrees, and the mounting surface is located at the upper end of the dustproof shell 1. The mounting surface is attracted to the side surface and the upper surface of the vehicle plate of the large transport vehicle through magnets, and the butterfly nut is adjusted to adjust the clamping distance between the bottom plate 51 and the horizontal part of the L-shaped clamping plate 52 to clamp the vehicle plate flange of the large transport vehicle. Fig.12 .

[0072] Therefore, the protection device is easy to install and disassemble on a large transport vehicle, can be adapted to installation in a variety of different working conditions, and can simultaneously realize horizontal and vertical distance measurement when passing through obstacles.

[0073] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for measuring distance of a large transport vehicle, characterized in that: It comprises an upright cubic dustproof housing (1), a laser distance measuring device is installed inside the dustproof housing (1), and a circular optical lens (2) of the laser distance measuring device is correspondingly installed at the bottom of the dustproof housing (1), so that laser light emitted by the laser distance measuring device is projected through a lens window hole (11) at the bottom of the dustproof housing (1); The bottom end of the dustproof housing (1) is provided with an openable mirror cover mechanism, the mirror cover mechanism comprising a first motor (31), a large gear (32) and a small gear (33) meshing with each other, the large gear (32) and the small gear (33) being arranged horizontally at the bottom end of the dustproof housing (1) via a mounting seat (35), the output shaft of the first motor (31) being coaxially connected to the small gear (33) via a keyway, a light transmission hole (321) being provided in the middle of the large gear (32) corresponding to the lens window hole (11), a cross-shaped groove (322) being provided on the upper end surface of the large gear (32), four sliding blocks (323) being provided in cooperation with each other in the cross-shaped groove (322), when the large gear (32) rotates forward or reversely, the four sliding blocks (323) are aligned or separated corresponding to one end of the light transmission hole (321), so that the light transmission hole (321) can be covered or opened; The dustproof housing (1) is provided with a dust removal mechanism, which comprises a second motor (41), a dust removal brush (42) and a dust sensor (43), and the output shaft of the second motor (41) is coaxially connected to the optical lens (2) via a keyway, and the dust sensor (43) is mounted on the bottom end of the dustproof housing (1). The rotation speed of the second motor (41) can be controlled according to the detection result of the dust sensor (43), thereby controlling the rotation speed of the optical lens (2) relative to the dust removal brush (42) to properly clean the optical lens (2); The protective device further comprises a fixed installation mechanism, the fixed installation mechanism comprising a horizontally arranged bottom plate (51) and an L-shaped clamping plate (52) arranged above the bottom plate (51) via a butterfly nut, the horizontally extending end of the L-shaped clamping plate (52) being movably connected to the side surface of the dustproof housing (1) via a rotating shaft (53); when installing the protective device, the butterfly nut is adjusted to adjust the clamping distance between the bottom plate (51) and the horizontal portion of the L-shaped clamping plate (52), so as to clamp the vehicle plate of the large transport vehicle and complete the fixed installation.

2. A protective device for distance measurement of a large transport vehicle according to claim 1, characterized in that: A mounting boss (12) is provided on the dustproof housing (1) above the rotating shaft (53); The horizontal portion of the bottom plate (51) extending away from the end of the dustproof housing (1) and extending out of the L-shaped clamping plate (52) is the bottom plate extension end, and the upper end surface of the bottom plate extension end and the corresponding surface of the vertical portion of the L-shaped clamping plate (52) are perpendicular to each other to form a mounting surface (54); Magnetic attraction grooves (6) with magnets are evenly arranged on the convex surface of the mounting boss (12), the mounting surface (54), the bottom plate (51) and the corresponding connecting surfaces of the dustproof housing (1); When the L-shaped clamping plate (52) is arranged horizontally, the corresponding connecting surfaces of the bottom plate (51) and the dustproof housing (1) are attracted by magnets, so that the mounting surface (54) is located on one side of the dustproof housing (1); When the horizontal portion of the L-shaped clamping plate (52) is turned upward by 90 degrees, the horizontal portion of the L-shaped clamping plate (52) and the mounting boss (12) are attached and attracted by magnets, so that the mounting surface (54) is turned upward by 90 degrees, and the mounting surface (54) is located at the upper end of the dustproof housing (1).

3. A protective device for distance measurement of a large transport vehicle according to claim 1, characterized in that: The dustproof housing (1) is provided with a top cover (13) and a bottom cover (14) at the upper and lower ends respectively, and a vertical partition (15) and a horizontal partition (16) are provided inside the dustproof housing (1); The horizontal partition (16) is arranged at the bottom of the dustproof housing (1) to separate the bottom of the dustproof housing (1) into a lens cavity (17), and the optical lens (2) is arranged horizontally in the lens cavity; The vertical partition (15) is arranged in the dustproof housing (1) above the lens cavity and separates the distance measuring device cavity and the driving control cavity; A distance measuring device is installed in the distance measuring device cavity, a driving device is installed in the driving control cavity, and the lens window hole (11) penetrates a horizontal partition (16) and a bottom cover (14) corresponding to the distance measuring device cavity, so that laser light emitted by the distance measuring device is emitted through the optical lens (2) and the lens window hole (11); The second motor (41) is installed in the drive control cavity, the output shaft of the second motor (41) passes through the horizontal partition (16) and is coaxially connected to the optical lens (2) through a keyway, and the dust removal brush (42) is fixedly installed in the lens cavity below the optical lens (2).

4. A protective device for distance measurement of a large transport vehicle according to claim 3, characterized in that: An LED light strip (141) is provided at the upper end of the bottom cover (14), and a photoresistor (21) is provided above the optical lens (2); when the LED light strip (141) emits light, the photoresistor (21) is used to detect the cleanliness of the optical lens (2).

5. A protective device for distance measurement of a large transport vehicle according to claim 1, characterized in that: The mounting seat (35) is in the shape of a circular plate, and a circular hole is provided in the middle of the circular plate corresponding to the light-transmitting hole (321), and a small gear mounting hole (351) is provided on the outer circumference of the circular plate. Four arc grooves (352) are correspondingly formed on the circular plate, and an insertion shaft is uprightly formed on each of the sliders (323). The insertion shaft is movably inserted into the corresponding arc groove (352). When the large gear (32) rotates, the insertion shaft moves in the corresponding arc groove (352), and at the same time, each slider (323) slides along the cross-shaped groove (322). One end of each slider corresponding to the light-transmitting hole (321) is a 45° tip. When the 45° tips of the four sliders are aligned, the circular hole and the light-transmitting hole (321) are covered.

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